Add relnotes for 13.0 about Allwinner improvements

Reviewed by:	gjb
Approved by:	gjb
Differential Revision:	https://reviews.freebsd.org/D29191

website/content/en/releases/13.0R/relnotes.adoc

@@ -239,6 +239,21 @@ The {{< manpage "ping" "8" >}} and {{< manpage "ping6" "8" >}} utilities both su
 
 This section covers general hardware support for physical machines, hypervisors, and virtualization environments, as well as hardware changes and updates that do not otherwise fit in other sections of this document.
 
+[[ARM-ARM64]]
+=== Allwinner
+
+The aw_gpio driver have been improved to handle GPIO interrupts. gitref:0fe5379c6a9[repository=src]
+
+A new aw_pwm driver have been added, pwm channels can be configured with {{< manpage "pwm" "8">}}. gitref:277a038d0da[repository=src]
+
+Battery sensors were added to the AXP803/AXP813 drivers. gitref:66bddb4c701[repository=src]
+
+Audio is now working on H3/H5 SoCs. gitref:bfcf888a87a[repository=src]
+
+Infrared receiver now works on H3 SoC. gitref:012fba460ac[repository=src]
+
+USB DRD is now working on multiple Allwinner SoC, this means that some usb port can be used as peripherals. gitref:aea49d9fed9[repository=src]
+
 [[hardware-virtualization]]
 === Virtualization Support